You have to figure that when a group of San Francisco administrators and politicians gather on a street corner, something is up. They're bucking history, to a degree, on the grand thoroughfare that predates the Great Quake of 1906. It was chaos then and it still is. If you look at it now, the faces and modes of transportation have changed, but it still has chaos.
"This is a significant change... and this is part of trying to bring order to the chaos," Ed Riskin, San Francisco's director of transportation said.
He is justifying the big changes on Market Street between 3rd and 8th streets. Beginning Tuesday, private cars will not be allowed to turn during those blocks, they must continue straight down Market Street. The drivers also can't turn onto Market Street, along much of the stretch, but those driving private cars can proceed straight across Market.
Take a look at the map of the Market Street changes here
"Some of them will be in for a surprise, but I actually think people will get used to this," San Francisco District 6 Supervisor Jane Kim said.
Data shows 160 injury accidents in two years between 3rd and 8th. Private cars make up 10-30 percent of the traffic, but they were responsible for 80 percent of the collisions.
You'll notice new signage, better markings in streets and crosswalks, a freer flowing Muni and supposedly, more safety for bike riders.
"Well there is a lot of traffic and if busses and professional drivers who know where they are going, then we won't have random people turning left," bicyclist Carl Blij said.
And that's what the city calls progress in these four lanes with more than a century of chaos in motion.